不同温度条件下5种流体树脂微渗漏程度的对比研究

Comparative study on microleakage degree of five kinds of fluid resins under different temperature conditions

目的研究温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂微渗漏的影响,为临床选择较理想的流体树脂提供参考。方法选取因正畸拔除的成人离体前磨牙60颗,随机分为10组(n=12),根据是否经过冷热循环老化实验,分为F00A组、Z350A组、SDRA组、TetricA组、ConsticA组,F00B组、Z350B组、SDRB组、TetricB组、ConsticB组,共10组。每颗离体牙咬合面预备成宽2 mm、长4 mm、深2 mm的Ⅰ类洞,分别用所属组别流体树脂充填,A组试件亚甲基蓝染色实验,B组试件先进行5000次冷热循环老化实验后再进行亚甲基蓝染色实验,之后将所有试件牙冠部沿颊舌(腭)方向平行于牙体长轴纵向剖开,体视显微镜下观察各组微渗漏情况,记录数据并分析。结果①F00A组、Z350A组、SDRA组、TetricA组、ConsticA组5组微渗漏的差异并没有统计学意义(P>0.05)。②SDRB组、TetricB组的微渗漏程度大于F00B组、Z350B组,差异具有统计学意义(P<0.05)。③温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂之间的微渗漏程度影响有显著差异(P<0.05)。结论①未经过冷热循环老化实验时,Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂的即刻微渗漏程度无明显差异。②经过冷热循环老化实验后,SDR流体树脂、Tetric^(®)N⁃Flow流体树脂微渗漏程度较高,边缘密合性不佳;Beautifil Flow Plus F00流体树脂、Filtek^(TM)Z350 XT流体树脂微渗漏程度较低,边缘密合性较优。③冷热循环老化实验加重了Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂的微渗漏程度。

Objective To study the effect of temperature on microleakage of Beautifil Flow Plus F00,Filtek^(TM) Z350 XT,SDR,Tetric^(®)N⁃Flow and Constic,and to provide reference for clinical selection of ideal fluid resins.Methods A total of 60 adult detached premolars removed for orthodontic extraction were divided into 10 groups(n=12),which were divided into F00A group,Z350A group,SDRA group,TetricA group and ConsticA group according to whether they had undergone cold and hot cycle aging test,and F00B group,Z350B group,SDRB group,TetricB group,ConsticB group,a total of 10 groups.The occlusal surface of each isolated tooth was prepared into a typeⅠhole with the width of 2 mm,length of 4 mm and depth of 2 mm,which was filled with the corresponding fluid resin respectively.Methylene blue staining experiment was performed on specimens in group A,and methylene blue staining experiment was performed on specimens in group B after 5000 times of cold and hot cycling aging experiment.The crowns of all specimens were dissected longitudinally along the long axis of the tooth body from the direction of buccal tongue(palate).The degree of microleakage in each group was observed under stereomicroscope,and the data were recorded and analyzed statistically.Results①There was no significant difference in the degree of microleakage between the F00A group,the Z350A group,the SDRA group,the TetricA group and the ConsticA group(P>0.05).②The degree of microleakage in the SDRB group and TetricB group was significantly higher than that in the F00B group and Z350B group(P<0.05).③Temperature had a significant effect on the microleakage degree of Beautifil Flow Plus F00,Filtek^(TM) Z350 XT,SDR,Tetric^(®)N⁃Flow and Constic(P<0.05).Conclusion①There was no significant difference in the de⁃gree of immediate microleakage of Beautifil Flow Plus F00,Filtek^(TM) Z350 XT,SDR,Tetric^(®)N⁃Flow,and Constic without cold and hot cycle aging experiments.②After the cold and hot cycle aging experiments,the microleakage degree of SDR fluid resin and Tetric^(®)N⁃Flow fluid resin was high,and the edge tightness was poor.Beautifil Flow Plus F00 fluid resin and Filtek^(TM) Z350 XT fluid resin had a low degree of microleakage and better edge tightness.③The micro⁃leakage degree of Beautifil Flow Plus F00,Filtek^(TM) Z350 XT,SDR,Tetric^(®)N⁃Flow and Constic was aggravated by the cold and hot cycle aging experiments.